Artículo
Rotation curve bifurcations as indicators of close recent galaxy encounters
Pedrosa, Susana Elizabeth
; Tissera, Patricia Beatriz
; Fuentes Carrera, I.; Mendez de Oliveira, Claudia
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
12/2008
Editorial:
EDP Sciences
Revista:
Astronomy and Astrophysics
ISSN:
0004-6361
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Rotation curves of interacting galaxies often show that velocities are either rising or falling in the direction of the companion galaxy. We seek to reproduce and analyse these features in the rotation curves of simulated equal-mass galaxies suffering a one-to-one encounter, as possible indicators of close encounters. Using simulations of major mergers in 3D, we study the time evolution of these asymmetries in a pair of galaxies, during the first passage. Our main results are: (a) the rotation curve asymmetries appear right at pericentre of the first passage, (b) the significant disturbed rotation velocities occur within a small time interval, of ~ 0.5 Gyr h^-1, and therefore the presence of bifurcation in the velocity curve could be used as an indicator of the pericentre occurrence. These results are in qualitative agreement with previous findings for minor mergers and fly-byes.
Palabras clave:
Galaxies: Evolution
,
Galaxies: Interactions
,
Galaxies: Formation
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Articulos(IAFE)
Articulos de INST.DE ASTRONOMIA Y FISICA DEL ESPACIO(I)
Articulos de INST.DE ASTRONOMIA Y FISICA DEL ESPACIO(I)
Citación
Pedrosa, Susana Elizabeth; Tissera, Patricia Beatriz; Fuentes Carrera, I.; Mendez de Oliveira, Claudia; Rotation curve bifurcations as indicators of close recent galaxy encounters; EDP Sciences; Astronomy and Astrophysics; 484; 2; 12-2008; 299-302
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